Vray Proxy Export and Motion Blur problem

[REDVERTEX]

Hi,
It's Dimitar Nenov from Red Vertex. I have a some problem with exporting a GrowFX animated tree. I'm using a 3ds max Mesher to get the geometry from the GrowFX object and everything looks fine in the mesher. I then export the mesher to animated vray proxy. When reviewing in bounding box in some frames the bounding box becomes enourmous and in most It's normal size. There is no such problem when reviewed from file. This is just one part of the problem. When It comes to rendering It becomes even more complicated. Everything looks fine when rendered without motion blur but when I turn It on the tree looks enourmous in the frames where the bounding box looks enourmous. I export the tree several times with mesher and without It(directly from the growfx object) but nothing helps.

Regards,
Dimitar Nenov

[chriserskine]

motion blur doesn't work with vray proxies. unless that has changed recently

[tashko.zashev]

Hi,

motion blur doesn't work with vray proxies. unless that has changed recently

V-Ray can produce motion blur on Proxy objects but for only one frame duration at the moment.

When It comes to rendering It becomes even more complicated. Everything looks fine when rendered without motion blur but when I turn It on the tree looks enourmous in the frames where the bounding box looks enourmous.

Would it be possible to prepare an example scene for us to test here?
If yes, you can post it here or send it to our support@chaosgroup.com mail.

[REDVERTEX]

Hi,
I managed to track down the problem to the max file of the growFx tree that we used from growFX tree library. If you create a clean scene, create a growFX object and load the preset of the tree everything is OK but If you use the max file from growFX website It's broken. It still doesn't explain why the tree scales only with motion blur switched on.
Here is the tree I'm talking about.

http://exlevel.com/PlantsLibrary/?download=1&id=31

Regards,
Dimitar Nenov

[vlado]

motion blur doesn't work with vray proxies. unless that has changed recently

Of course it works (always has).

Best regards,
Vlado

[REDVERTEX]

Of course it works (always has).

Best regards,
Vlado

It's working prety fine for us so far too. The only bug that we've met so far is that when using animated proxies with motion blur and changing the geometry samples in the Motion blur rollout the proxies are missing in some buckets (it's really buckets not just a single node in DR. It's some buckets of a single machine ). Changing it back to default value of 2 fixes the problem.

Regards,
Dimitar Nenov

[tashko.zashev]

Hi,
I managed to track down the problem to the max file of the growFx tree that we used from growFX tree library. If you create a clean scene, create a growFX object and load the preset of the tree everything is OK but If you use the max file from growFX website It's broken. It still doesn't explain why the tree scales only with motion blur switched on.
Here is the tree I'm talking about.

http://exlevel.com/PlantsLibrary/?download=1&id=31

Regards,
Dimitar Nenov

Thank you, managed to reproduce the same bounding box and motion blur issue here.

Will make more detailed investigation and will post an update here once it is available.

[REDVERTEX]

Hi again,
First I thought that Exlevel's file is broken but We get the same problem again with another animated object (animated cloth).

Regards,
Dimitar Nenov

[Svetlozar Draganov]

According to GrowFX - could you please try to convert GrowFX animation to mesh animation by turning on the Convert to Mesh/Spline in the Preference parameters rollout and then try to convert it to Editable Mesh/Poly instead of using Max Mesher Tool.
Unfortunately we are not able to convert it here because this option is not available in the demo-version - but if you manage to convert GrowFX to standard Poly-animation I would suggest that from that point there won't be any troubles with VrayProxy animation conversion.

I also did another test according to Exporting Vrmesh animation from Mesher objects without using GrowFX objects and I got a positive result - the bug doesn't persist if simple objects is used instead of GrowFX.

[3LP]

humm,
I allways have had issues with vray proxys and MB, did seem to work for me.

I mainly use them to export animated ppl that have been rigged with bipeds and mocap.

I will try to make a scene and send your the file if you want to...
I happened to me again not longer than 2 weeks ago for me.

Stan

[3LP]

mmm, well, in my test scene here it seems to work.
I don't know why it didn't for all the previous time I tried but it didn't work.
Might be scene related or plugin related or any legacy data that corrupt the scene.

I will try to un-archive the project and render again where I had the issue when I have time.

I will keep you posted.

Stan

[Svetlozar Draganov]

Yep - in many cases the issue is scene-dependent and it is difficult to help you guys without any chance to reproduce it, so example scenes are always very helpful for us.

[3LP]

Ok, I tried again to have ppl motion blurred with proxys, and it seems to be blurring to a certain extend, but not as much as I would like to, even if I set the shutter speed at 0.001 (s^-1) I still got my ppl blurred only a bit. (1 frame?)
I am looking for a long trail blurring effect, like if the shutter speed was open for 30 seconds.

Can I create a file and send it somewhere?
Unfortunately it's assets we have purchased so I'm not allowed to post them publicly.

Thanks

Stan

[vlado]

Unfortunately proxies only support blur for one frame right now. I'm not sure if Alembic will work better, I have to check.

Best regards,
Vlado

[3LP]

Right, ok then, that's a good info

I'll go to mesh in-staid if needed.

Cheers

Stan